A hologram is a three-dimensional image that can be animated. This special effect, used for various purposes, can be very sophisticated. Nevertheless, it is possible to reconstitute the holographic effect by making a suitable projection screen. Easily transform a flat image into a three-dimensional object using the user guide provided by wikiHow.
Part 1 of 3: draw the pattern for your projection screen
Step 1. Prepare your materials
The projection screen is made of a rigid plastic plate. You can buy them at a hobby store or just recycle a disc case. To draw the pattern for your projection screen, take a sheet of grid paper, a pencil and a ruler. For the actual construction, provide transparent adhesive tape or transparent glue.
Step 2. Draft your projection screen
Its three-dimensional shape is that of a regular pyramid with a square base and the tip of which is truncated. Providing a pattern will allow you to visualize the size of your pyramid and possibly adjust its dimensions. In addition, the pattern facilitates the work of cutting plastic.
- The easiest method, detailed by wikiHow in this article, is to draw one side of the pyramid on your sheet. It will be used as a model to draw and cut the four faces.
- You can also draw the complete pattern of a truncated pyramid and transfer it as is on the plastic. Cut out and then create your pyramid by folding over at the edges. This method gives a cleaner result, but it is more complex to perform and requires an easily malleable plastic.
Step 3. Draw the pattern of the projection screen
In two dimensions, each side of the screen is an isosceles trapezoid. It is a particular form of trapezoid whose two non-parallel sides are of the same length. In addition, the two bases have a common perpendicular bisector which is also the axis of symmetry and the height of the figure. To easily draw your isosceles trapezoid, start with the height. Draw the two bases from it, then connect them by tracing the slanted sides.
- For a telephone screen, the dimensions of the isosceles trapezoid are as follows: 3.5 cm for the height, 6 cm for the large base, 1 cm for the small base.
- To enlarge the size of the projected image, you can increase the dimensions of the isosceles trapezoid. Be sure to keep the same proportions, otherwise the projected image will lose quality. You need to adapt the size of your pyramid to that of your phone or tablet screen. If you are using an iPad-type tablet, plan for an isosceles trapezoid with larger dimensions: 7 cm for the height, 10 cm for the large base, 2 cm for the small base.
Step 4. Carefully cut out your isosceles trapezoid
You can use a pair of scissors or a utility knife. Whatever your choice, achieve a clean and precise cut.
Part 2 of 3: create the projection screen
Step 1. Prepare your plastic plate
If you have recovered a case, remove the edges using a cutter. Clean the plate so that the final rendering is as successful as possible. Indeed, the presence of dust or traces on the plastic may affect the visual experience.
Avoid using a case with scratches. Like dust or smudges, it can spoil your work. However, a dirty or scratched case does not prevent the success of the experiment
Step 2. Transfer the isosceles trapezoid to your plate
Your projection screen having four sides, you must be able to cut as many figures in your plastic plate. Draw them with a pen or a fine-tipped felt-tip pen on the plate, using your pattern. You can also place the plate on the pattern and follow its contours transparently.
It's easier to cut your entire pyramid out of a single plastic sheet. However, if your projection screen is large, you can use an additional plate
Step 3. Cut out the faces of your pyramid
Use a cutter suitable for cutting rigid material. Line up a ruler along each side of the trapezoids and press down firmly to stabilize it. Iron the cutter blade several times along the ruler to cut the plastic cleanly.
For easier cutting work, make sure you have a completely flat plate. This will allow you to place it on the worktable
Part 3 of 3: Create the three-dimensional animation effect
Step 1. Mount the projection screen
Glue the four faces to form your pyramid with a truncated point. Line up two pieces of plastic and tape them together neatly with tape at both ends. Then add the other two faces.
If you want, you can replace the tape with clear glue. Take two sides and clean the edges. Put a few dots of glue on it and press the pieces of plastic together for a few seconds. After the glue dries, add another side. Although longer and more thorough, this method produces a cleaner result
Step 2. Finalize your projection screen
Place your construction on its wide base. If you used duct tape, form sharp edges, eliminating any gaps between the sides. To do this, simply press the faces in contact against each other. If necessary, add duct tape or a dot of glue at the tops to maintain the shape of your projection screen.
Step 3. Prepare the image to be projected
To create the desired effect, the same animated image must be projected on each face of the pyramid. To find such videos, you can search online by combining the words "hologram" and "pyramid" in bars and search engines.
Step 4. Place your projection screen
Place your pyramid on its small base in the center of your phone or tablet screen. Specifically, your inverted pyramid should be in the middle of the four images. By an optical phenomenon, these will form a three-dimensional image in the center of the pyramid. To make the most of it, conduct your experiment in a dark room and admire the result!
- To get clean edges when cutting plastic, hold the ruler and cutter firmly.
- Once the plastic is deeply nicked, you can break it by hand to get the faces of your pyramid. Be careful to avoid cuts.
- This projection method is basic and only gives convincing results on simple images. Although impressive, it only roughly reproduces the effects of holography, which is a much more complex technique. Indeed, the latter requires the use of a laser and involves advanced physical and optical phenomena.
- Be careful when using the cutter to cut the plastic.
- If necessary, ask those around you for help.